Lidar Bathymetry – Technology and applications Oct 24rd, Netanya, Israel

1. Lidar Bathymetry – Technology and applicationsOct 24rd, Netanya, Israel Anders Ekelund Managing Director Airborne Hydrography AB

2. Airborne Hydrography AB World recognized supplier of Airborne LIDAR systems Products • HawkEye II for bathymetry • Chiroptera for shallow water • DragonEye for land Privately owned Airborne Hydrograpy was formed in a buyout from SAAB AB, and has accumulated more than 25 years of bathymetric LiDAR product development for SAAB and the Swedish Navy

3. Products 3 • HawkEye II • An airborne coastal survey system including deep water bathymetry and topographic LIDAR • Chiroptera • A shallow water coastal survey system including high density bathymetric LIDAR and high end topographic LIDAR • DragonEye • A high end pure topographic LIDAR system

4. LIDAR Bathymetry - What’s the Attraction? LiDAR Bathymetry is very cost efficient tool for large scale digital elevation modelling projects in the coastal zone Area coverage 10-50 km2 per hour The advantages of LIDAR bathymetry - Delivers data from both land and sea/floor - Fast progress (typical 10-50 Square km / hour) - No hazard for survey ships - Delivers the accuracy the authorities need

6. System design

7. Batmetric LIDAR • Typical end products • X,Y, Z point clouds (bathymetric and topographic) • Digital Elevation Models • Bathymetric charts, X,Y depths created from HawkEye data and tidal model • Shoreline definition • Image orthomosaics • Sea-bed reflectance product • Additional environmental products

8. Visingsö - Multibeam

9. Visingsö – Topographic HawkEye II data

10. Visingsö – Bathymetric HawkEye II data

11. Visingsö – Bathymetric HawkEye II data

12. Visingsö - Shoreline

13. Visingsö – Contour lines

14. Sea bed reflectance

15. Sample data – Combined bathy – topo / Motala river mouth

16. Sample data Topo example – Industrial area

17. Sample data – RGB colored point cloud

18. Sample data – RGB colored point cloud

19. Sample data – River Topo / Bathy crossection

20. Sea-mine detection • Dummy sea-mine • 70 cm diameter water filled boat fender, • painted in NATO green according to Ministry of Defence standard 00-23, Issue 3, may 30m 2001. • Anchored on about 2,5 meters depth, at about 5,5 meters water depth.

21. Sea-mine detection • The sea-mine is clearly visible in between the sea-surface and sea-bed

22. Natural target at sea-floor • Blue - Multibeam data • Green - LIDAR data • 0.8 meter high bolder found in both multibeam and LIDAR dataset

23. Man made target • Blue - Multibeam data, • Green - LIDAR data • A one meter high cube placed on the sea-floor after the multibeam survey, discovered by the LIDAR

24. Sample data – Boats in the harbour

25. Sample data- 2 meters dreging for new small boat harbour

26. Sample data28 meter high object on the surface, 4,4 meters depth belowWhat’s that?

27. A Fountain!

28. SummaryModern bathymetric LIDAR • Simultanious capture of topo and bathy • Full waveform in both topo and bathy • Reasonable depth penetration • > 20 meter in clear waters k=0,1 • > 10 meters in less clear water k=0,2 • Capture of small targets • IHO special order objects detected to about 2/3 of the depth penetration • Excellent accuray • Bathymetry close to IHO special order (25 cm, 2 sigma, absolute)

29. SummaryModern bathymetric LIDAR • High data density • Typical • Topo > 10 points per square meter • Bathy > 1 point per square meter • Easy installation • Sensor weight: 80 Kg • Power consumption: 15 Amp on the 28 VDC supply • One single turn key unit • Simple touch sceen operators interface

30. SummaryModern bathymetric LIDAR • Can be used for a large number of appliacations • Coastal monitoring • Sea-Charting • Environmental monitoring • Oil and Gas Pipelines • Ports, harbours • River survey • Object (sea-mine detection) • Sea-bed classification • Military applications